CN2200529Y

CN2200529Y - Steps combined force-out screw arbor

Info

Publication number: CN2200529Y
Application number: CN94221892U
Authority: CN
Inventors: 王檑
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-09-16
Filing date: 1994-09-16
Publication date: 1995-06-14
Anticipated expiration: 2004-09-16

Abstract

The utility model discloses a step-shaped combined extruding screw rod. The utility model can be realized by the technical proposal that the front part of a hollow screw rod is connected with a kneading disk; the kneading disk is connected with the rear part of a subsidiary screw rod probing towards the front part; the inner part of an inner hole at the rear part of the hollow main screw rod is connected with a connecting disk; the connecting disk is connected with the drive shaft of the drive system; the side of the outer end face of the knead disk is provided with a radial spacing-shaped groove; the outer part of the main screw rod and the subsidiary screw rod is sheathed with a mechanical barrel which is matched with the main and subsidiary screw rods; the drive shaft can be driven to rotate by the drive system; the drive shaft can make the dynamic force be transferred in sequence to the connecting disk, the main screw rod, the kneading disk, and the subsidiary screw rod; two screw rods with different structures sharing one shaft can accomplish the different processing requirement in the mechanical barrel which is corresponding to two screw rods and is matched with two screw rods.

Description

Steps combined force-out screw arbor

The utility model relates to a kind of plastic processing machinery, the rank type combined type extrusion screw rod that is adopted in particularly a kind of plastic extruder.

Extrude in the based article processing at present plastics, the most widely used is single screw rod and double screw extruder, the general screw rod that is all driven in the machine barrel by transmission mechanism of this class extruder rotates, shear, plastify and be fed forward with the solid material that will add in the machine barrel, extrude from the shape of the mouth as one speaks of head with molten condition at last.Along with the increasing of the development of plastic products and new processing request, single screw rod or double screw extruder have not satisfied these new requirements, continuous mixing and carry the one side its unified one side is arranged, its contradiction is also arranged for example, in course of conveying, if transporting velocity surpasses certain limit then is mixing just insufficient, it is just bad to extrude quality, if otherwise require melting effect good especially, then transporting velocity just can not be too fast, that is to say that rotating speed can not be too high, and spiral groove depth can not be too big, has influence on the output of extruder so again.Therefore, people have proposed with the supporting way of finishing and solve this contradiction of two extruders, stepwise extruder just, it adopts the method for two structures, extruder phase configuration that performance is different to finish separately main task separately, and comprehensively finishes whole process, so not only can solve some insoluble contradictions at present, and simplify and reduced extruding multi-parameter coupling designing requirement, thereby, also reduced the screw rod design difficulty, make the simple and unification of screw rod.This class stepwise extruder dispose the form that two single screw rods or a single screw rod and twin-screw are mixed.Though it has solved some insoluble problems, cost of investment, energy consumption floor space are all bigger, not too to one's profit economically.

The purpose of this utility model just is to overcome the above-mentioned shortcoming and defect that prior art is deposited, and a kind of rank type combined type extrusion screw rod that provides a kind of and in an extruder, both can satisfy special processing request, have lower investment and energy consumption.

The purpose of this utility model is to realize by following technical scheme: one is connected with a kneading disk in the screw rod front portion of hollow, kneading disk is connected with the sub-screw rear portion of preceding spy again, be connected with a terminal pad in the driving screw rear portion endoporus of hollow, terminal pad is connected with the biography axle of transmission system, the outer face side of kneading disk offers radial interval shape groove, in major-minor screw rod outer cover the machine barrel that matches with it is housed.Rotate by the transmission system drives power transmission shaft, power transmission shaft passes to terminal pad, driving screw, kneading disk and sub-screw successively with power, makes two sections different coaxial screw rods of structure finish different processing needs in the corresponding supporting machine barrel with it.

Therefore: remarkable result of the present utility model is:

The 1st: in an extruder, can finish the multiple different processing request that requires, both satisfy the needs of special processing, reduce the cost of machine again, and, make design, the processing request of screw rod all become simple.

The 2nd: sub-screw and kneading disk by changing different specification frameworks, then can reach different combined effects, make a kind of rank type extrusion screw rod have wider adaptability.Can reduce equipment investment and product cost relatively.

The 3rd: since its have shearing can be little, residence time of material is short, thereby it has energy-conservation effect, is specially adapted to the processing of heat sensitive material.

Concrete structure of the present utility model is realized by the following examples and accompanying drawing thereof:

Fig. 1 is a section of structure of the present utility model.

Fig. 2 is that the A of Fig. 1 is to cutaway view.

Fig. 3 is that the A of second kind of structure of kneading disk among Fig. 1 is to view.

Fig. 4 is the profile of the third structure of kneading disk among Fig. 1.

Below in conjunction with accompanying drawing 1-4 concrete structure of the present utility model is described in detail:

Cover is connected with a kneading disk 4 in the front portion of the endoporus 52 of a hollow driving screw 5, kneading disk 4 center are connected with the sub-screw of visiting before one 1, rear sleeve at driving screw 5 endoporus is connected with terminal pad 8, the center of terminal pad 8 interlocks mutually with the output shaft of transmission mechanism 7, and the outside end face 42 of kneading disk 4 is the roughness structure.Referring to Fig. 1 to Fig. 3

Architectural feature of the present utility model also is:

The sub-screw 1 and the driving screw 5 of suit are provided with the different screw thread of structure 11 and 51 with periphery separately with stepped machine barrel 9, the centre bore 41 of the back segment of sub-screw 1 and kneading disk 4 is circumferentially located by rear screw 6 axial location and by key 2 and kneading disk 4, the centre bore 81 of terminal pad 8 is circumferentially located by screw 6 axial location and by key 2 and output shaft 7 with output shaft 7, be connected to a fixed together by peripheral screw 3 or connecting thread between the driving screw 5 of kneading disk 4 and terminal pad 8 and hollow, the roughness structure on kneading disk 4 outside end faces 42 is to be made of separately radial groove or pin 421.Referring to Fig. 1 to Fig. 3

The diameter of the external diameter of driving screw 5 and sub-screw 1 changes between 7:1-7:5 than scope, and the outboard end basal plane 42 of kneading disk 4 is the plane or the conical surface.

Operation principle of the present utility model is as follows, drives rank type screw rod by the rear portion transmission mechanism and rotates in the stairstepping machine barrel, because diameter, the helicitic texture of major-

minor screw rod

1 and 5 differ greatly, therefore, they can the complete separately different processing tasks of performance.

In addition, by changing different kneading disk 4 sub-screws 1 different of end face structure, then can reach multiple combining form, so have advantage of wide range of application with diameter and helicitic texture.

Also have two shrinking sections 91 and 92 that diameter is different with the stairstepping machine barrel 9 that this screw rod matches, its shrinking section 91 and 92 transition positions with control close the dish 4 corresponding end-face wall 93 medial surface pin or groove 931 are also arranged, the effect of both ends of the surface has been to mediate the effect of being mixed, and the major-minor spiro rod section is then finished conveying, plastifies and extrude effect.The major-minor transition position both can make plane transition shape, also can be circular cone transition shape, at this transition position, good exhaust effect was arranged then.

Claims

1, rank type combined type extrusion screw rod, it is characterized in that: cover is connected with a kneading disk (4) in the front portion of the endoporus (52) of a hollow driving screw (5), kneading disk (4) center is connected with the sub-screw of visiting before (1), rear sleeve at driving screw (5) endoporus is connected with terminal pad (8), the center of terminal pad (8) interlocks mutually with the output shaft (7) of transmission mechanism, and the outside end face (42) of kneading disk (4) is the roughness structure.

2, according to the described rank of claim 1 type combined type extrusion screw rod, it is characterized in that: with stepped machine barrel (9) separately the periphery of the sub-screw of suit (1) and driving screw (5) be provided with the different screw thread of structure (11) and (51), the centre bore (41) of the back segment of sub-screw (1) and kneading disk (4) is by rear screw (6) axial location and by the circumferential location of key (2) and kneading disk (4), the centre bore (81) of terminal pad (8) also passes through circumferentially location of key (2) and output shaft (7) with output shaft (7) by screw (6) axial location, be connected to a fixed together by peripheral screw (3) or connecting thread between the driving screw (5) of kneading disk (4) and terminal pad (8) and hollow, the concavo-convex flat-shaped structure on kneading disk (4) outside end face (42) is to be made of separately radial groove or pin (421).

3, according to claim 1 or 2 described rank type combined type extrusion screw rods, it is characterized in that: the diameter of the external diameter of driving screw (5) and sub-screw (1) changes between 7:1-7:5 than scope, and the outboard end basal plane (42) of kneading disk (4) is the plane or the conical surface.